<template>
	<!-- 避免数据闪烁，加个if判断，有值才展示页面 -->

	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="2000" :duration="1000" :circular="true">
			<swiper-item v-for="(item,i) in goods_info.pics" :key="i">
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="goods-price">￥{{goods_info.goods_price}}</view>
			<!-- 商品信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名字 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				<!-- 收藏按钮 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="grey"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递：免运费</view>
		</view>
		<!-- 商品详情 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		<!-- 商品导航组件 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
				@buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	import {
		mapState,
		mapMutations,
		mapGetters
	} from 'vuex'
	export default {
		//监听data外的属性值的变化
		computed: {
			// ...mapState('m_cart', cart)
			...mapGetters('m_cart',['total'])
		},
		//监听事件和data
		watch:{
			//定义total监听器，指向一个配置对象
			total:{
				//handler属性用来定义监听器的处理函数
			handler(newVal){
				//find方法查找数组，x代表数组里的所有值
				const findResult = this.options.find(x => x.text === '购物车') 
				if(findResult){
					findResult.info = newVal
				}
			},
			//immediate属性用来声明该监听器是否立即调用
			immediate:true
			}
		},
		data() {
			return {
				goods_info: {},
				options: [{
					icon: 'shop',
					text: '店铺',
					infoBackgroundColor: '#ff0000',
					infoColor: "#FFF"
				}, {
					icon: 'cart',
					text: '购物车',
					info: 0
				}],
				buttonGroup: [{
						text: '加入购物车',
						backgroundColor: '#ff0000',
						color: '#fff'
					},
				 {
						text: '立即购买',
						backgroundColor: '#ffa200',
						color: '#fff'
					}
				]
			};
		},
		onLoad(e) {
			const goods_id = e.goods_id;
			this.getGoodsDetail(goods_id);
		},
		methods: {
			...mapMutations('m_cart', ['addToCart']),
			async getGoodsDetail(goods_id) {
				const {
					data: res
				} =
				await uni.$http.get('/api/public/v1/goods/detail', {
					goods_id
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				//使用字符串replace方法将img标签添加行内的style的样式，解决图片之间又空隙的问题 /**/g全局替换
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,
					'<img style="display:block;" ')

				this.goods_info = res.message
			},
			// 轮播图预览
			preview(i) {
				uni.previewImage({
					current: i,
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			//根据返回的值判断用户所选按钮
			onClick(e) {
				if (e.index === 1) {
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}

			},
			buttonClick(e) {
				if(e.index === 0){
					//{goods_id,goods_name,goods_count,goods_small-logo,goods_state}
					const goods = {
						goods_id:this.goods_info.goods_id,
						goods_name:this.goods_info.goods_name,
						goods_price:this.goods_info.goods_price,
						goods_count:1,
						goods_small_logo:this.goods_info.goods_small_logo,
						goods_state:true
					}
					
					this.addToCart(goods)
				}
			}
		}
	}
</script>

<style lang="scss">
	swiper {
		height: 750rpx;

		image {
			width: 100%;
			height: 100%;
		}
	}

	.goods-info-box {
		padding: 10px;
		padding-right: 0;

		.goods-price {
			color: #c00000;
			font-size: 18px;
			margin: 10px 0;
		}

		.goods-info-body {
			display: flex;
			justify-content: space-between;

			.goods-name {
				font-size: 13px;
				margin-right: 10px;
			}

			.favi {
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				align-items: center;
				justify-content: center;
				border-left: 1px solid #efefef;
				color: grey;
			}
		}

		.yf {
			font-size: 12px;
			color: grey;
			margin: 10px 0;
		}
	}

	.goods_nav {
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}

	.goods-detail-container {
		padding-bottom: 50px;
	}
</style>
